/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alipay.sofa.registry.util;

import java.util.Collection;
import java.util.Optional;

/**
 * The type Collection utils.
 * @author zhuoyu.sjw
 * @version $Id : CollectionUtils.java, v 0.1 2018-04-12 14:54 zhuoyu.sjw Exp $$
 */
public class CollectionUtils {

    /**
     * Gets random.
     *
     * @param <E>  the type parameter 
     * @param e the e 
     * @return the random
     */
    public static <E> Optional<E> getRandom(Collection<E> e) {
        return e.stream().skip((int) (e.size() * Math.random())).findFirst();
    }

}
